Hadoop Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Apache Hadoop (394)
MapReduce (354)
Apache Hive (345)
Apache Pig (225)

Apache Ambari (93)
Apache HCatalog (34)
Apache HDFS Hadoop Distributed File System (214)
Apache Kafka (189)

Hadoop Interview Questions

Questions Answers Views Company eMail

What do you understand by an inner bag and outer bag in Pig?

884

Explain different execution modes available in Pig?

828

How do users interact with HDFS in Apache Pig ?

800

what are the basic parameters of a Mapper?

872

What is a MapReduce Combiner?

851

Where is Mapper output stored?

910

what is JobTracker in Hadoop? What are the actions followed by Hadoop?

829

Is it possible to split 100 lines of input as a single split in MapReduce?

1018

What is the fundamental difference between a MapReduce Split and a HDFS block?scale data processing?

934

Is it possible to rename the output file?

843

how JobTracker schedules a task ?

910

what is NameNode in Hadoop?

945

what does the conf.setMapper Class do ?

869

how is data partitioned before it is sent to the reducer if no custom partitioner is defined in Hadoop?

827

What is SequenceFileInputFormat?

870

Un-Answered Questions { Hadoop }

How do I load a big csv file into a partitioned table?

What are the roles of the file system in any framework?

328

Name a few commonly used spark ecosystems?

303

Why is hadoop faster?

688

Where is rdd stored?

327

Does the archiving of hive tables give any space saving in hdfs?

967

What are distinct operators in impala?

What does the Spark Engine do?

333

How do I start a spark cluster?

320

Define tasktracker.

689

What is cluster in Cassandra?

State syntax of the command to drop an index?

What are the different ways of executing Pig script?

836

how can we access the sub directories recursively?

851

Can you define serde in hive?

732

For More Un-Answered { Hadoop } Questions Click Here